How much memory does Windows Server 2008 R2 use?
The maximum capacities for 32 bit and 64 bit Server OSes is listed below:
- Maximum (32-bit systems): 4 GB (for Windows Server 2008 Standard) or 64 GB (for Windows Server 2008 Enterprise or Windows Server 2008 Datacenter
- Maximum (64-bit systems):32 GB (for Windows Server 2008 Standard) or 2 TB (for Windows Server 2008 Enterprise, Windows Server 2008 Datacenter, or Windows Server 2008 for Itanium-Based Systems)
The OS itself (Server 2008 R2) uses between 2 to 3 GB. So – on a 4GB system, you are left with 1GB for your applications.
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